Jean, I completely understand how you feel. I feel the same way. I had great health until a year ago and now I am facing a future that might mean never walking again. I want out. I just don't know how.

LOL. Doomed is too strong but you talk about being done with life because of it. That sounds like doom to me.

I am sorry but your husband sounds so selfish. How would he feel if the situation was the other way round and he needed YOUR support?
Probably won't help but you could try asking him that question.
But more practically, forget about him and concentrate on finding things that you can do that will make you happy. You deserve to be happy.
I can recommend taking some kind of classes - I am learning Spanish (don't ask why, I'm 74 so how much use will I get out of it?!?) The point is, I love the classes, the camaraderie, the friendship. And in between classes I have that interest (Duolingo, Youtube videos etc.) to keep me amused.
I find that, the older I get, it's friends rather than family that give the best support - and of course it is a two way thing. I am always there for them. To be needed is a lovely feeling.
After all, our family don't choose us but our friends DO, and we choose THEM, which is also a great feeling.
By the way I live on my own (since my selfish b***** husband decided he didn't need me anymore after 35 years of marriage), and I am less lonely now than I was in the marriage! And somehow I cope alone with all the infirmities that old age has thrown at me!
Wishing you lots of luck xx